Full speed ahead DX Pro ZS44/28.6|EC49/40 Headset

Aluminum construction. For tapered 50mm/57mm head tube. 1-1/8 alloy internal cup with 36deg/45deg ACB sealed bearing upper. 1.5 alloy external cup with 36deg/45deg ACB sealed 1.5 bearing lower. 141gtable{border-collapse:collapse;width:100%;}td{text-align: left;padding: 8px;}tr:nth-child(even){background-color:#f2f2f2}th{background-color:#eb212e;color:white;text-align:left;padding:8px;} TECH SPECSSHISZS44/28.6|EC49/40 ColorBlackWeight141g Steered OD28.6 Cup (mm)44/50 Race (mm)40 Stack Height30.3 Bearing Angle- Size1-1/8 to 1.5`